Fuel System Lean (Bank 1) *

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Trouble Ticket Help Requests for DTC P0171

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2002 Buick Rendezvous CX Plus 3.4L MIL Lamp onVIN: 3G5DB03E52P0171: Fuel Trim System Lean (Bank 1). This is long. Vehicle originally came in for int. ABS light
and ABS activation at low speeds. Found both front sensors
bad and replaced both hub ass. Cust. then wanted to fix
check engine light. I forgot to write down the code numbers
and check FF, but I do re...

2002 Chevrolet Cavalier 2.2L No StartVIN: 1G1JC52442P0171: Fuel System Lean (Bank 1). I am lost on this one.
Cranks but will not start. Backfire out of intake
sometimes. Sometimes catches a little bit like on one
cylinder but that is it. Seems as if the timing is way off.
Started by swapping a new ignition module, no change. Took
it back and ...

2001 Infiniti QX4 3.5L MIL Lamp on, lean exhaust bank 1VIN: JNRDR07Y51P0171: Fuel Trim Lean (Bank 1). ... lite and a code of
P0171 lean bank 1. The o2 was flat lined so I replaced it
and sent the car on it's way. 3 days later the lite came on
again same code. The o2's were both moving fine but the
bank 1 was more active as it was newer. So I cleaned the
MAF se...

2004 Cadillac DeVille 4.6L MIL Lamp onVIN: 1G6KF57954P0171: Fuel Trim System Lean (Bank 1). I have a 04 cadillac custemer complained his mil light is
on. I checked fuel trims long term was at 18 to 21. I put a
fuel pump in it because fuel pressure is supost to be
41/47. light stayed out for an hour or so fuel pressure is
35 lbs still. I was leaning o...

2005 Dodge Durango Limited 5.7L MIL Lamp onVIN: 1D4HB48D05P0171: Fuel System Lean (Bank 1). ... making me nuts. It
has a P0171 and P0174. The long term fuel trim at idle is
maxed at 33%. The ltft goes down to 15-20 when driving. I
have smoked the intake and found no leaks. When you add
supplemental fuel the ltft goes down to normal range. I
replaced ...

2006 Audi A3 2.0L No Start, Poor Idle QualityVIN: WAUHF78P26P0171: bank 1 system too lean. thx in advance to all audi techs.car came to us with
complaint of not restarting and setting check engine light
& also fuel cap light after filling up.car will restart
after 10 to 20 minutes but will run rough & finally clear
up after a minute or so.ch...

1998 Pontiac Bonneville SE 3.8L Hesitation, SurgeVIN: 1G2HX52K7WP0171: Fuel System Lean. So i test drove the car and could feel right away this
hiccup or glitchy feeling it exhibits. kind of like a lean
miss or some backfire/too much egr feeling. Usually does it
while cruising and then you accelerate, but it will act up
while leaving a parking lot...

1998 Pontiac Bonneville SE 3.8L Hesitation, SurgeVIN: 1G2HX52K7WP0171: Fuel System Lean. So i test drove the car and could feel right away this
hiccup or glitchy feeling it exhibits. kind of like a lean
miss or some backfire/too much egr feeling. Usually does it
while cruising and then you accelerate, but it will act up
while leaving a parking lot...

1999 Buick Regal LS 3.8L Cuts out, MIL Lamp onVIN: 2G4WB52KOXP0171: Fuel System Lean. ... have this Buick here
which I have been pulling my hair out on. I have been
chasing two code for some time now p0133 and p1133. Car
came in this summer with light on and both codes in it
watched scanner O2 switching slow so we put in a ac delco
sensor in ba...

2001 Toyota Corolla LE 1.8L Cuts outVIN: 1NXBR12E71P0171: Fuel System Too Lean (Bank 1). ... intermittently
stalling\cutting off only at stops at idle. I was able to
duplicate problem. Just idling in the bay in park in would
cut off about every 15-45 minutes. It would immediately
restart and run fine for another 15-45 min. I fixed the the
P0300 P0...

2002 Ford Windstar 3.8L MIL Lamp onVIN: 2FMZA51412P0171: Lean Bank 1. I have a windstar that has a lean code on both banks. I
have cleaned throttle body, IAC, MAF, and changed fuel
filter. When smoke testing there is a small leak on both
IMRC and the EGR. Is this normal? I have another windstar
with same codes and same codes and...

2001 Toyota Corolla LE 1.8L Cuts outVIN: 1NXBR12E71P0171: Fuel System Too Lean (Bank 1). ... intermittently
stalling\cutting off only at stops at idle. I was able to
duplicate problem. Just idling in the bay in park in would
cut off about every 15-45 minutes. It would immediately
restart and run fine for another 15-45 min. I fixed the the
P0300 P0...